Say what you will about the position, but give them credit for consistency: Catholic bishops in the UK say that, though creating so-called chimeras by adding human DNA to animal embryos (or vice versa) is wrong, the hybrids shouldn’t be destroyed once made:

The bishops said that they did not see why these “interspecies” embryos should be treated any differently than others. […]

In their submission to the committee, they said: “At the very least, embryos with a preponderance of human genes should be assumed to be embryonic human beings, and should be treated accordingly.

Proposed legislation scheduled to be debated in Parliament later this year would outlaw the implantation of chimera embryos into a woman’s womb.